[REACT] App crashing/stuck when moving multiple events and some aren't in view

[chuckn0rris]

Forum post

Hi,
We have an issue that when selecting multiple events, then scrolling so that one or more events are no longer visible/in view - the page crashes/gets stuck.
We are using version 5.6.3 but I have been able to successfully re-create this using one of your online demos using the latest version.

The demo I used is - https://bryntum.com/products/schedulerpro/examples-scheduler/frameworks/react/javascript/react-events/build/.
This is the recording:
https://github.com/bryntum/support/assets/7203098/51b36fa2-9dc4-48c9-9a2e-3fcc56caf60a

This is a screenshot of the error:

These are the exact steps:
Multi select two or more events
Scroll horizontally so that one of the events is no longer in view
Try dragging (by clicking on the visible event)

=> App crashes/ is stuck
Error appears in console (attached above).

I would appreciate it if you could look into this issue immediately and resolve it as soon as possible.
Thanks,
Odiya Erlichster

[canonic-epicure]

Made a brief check with the following results:

• exception is thrown in the addTemporaryDragElement of HorizontalRendering.js, which is called with the unusual domConfig argument, I guess containing unresolved react JSX element
• this is probably because the demo uses react JSX renderer for event

This is not my area of expertise, perhaps @jsakalos can investigate?